blob: 471ec638f26c05d43696cd1ff2d2febb84784dfc [file] [log] [blame]
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkGPipe.h"
#include "SkGPipePriv.h"
#include "SkReader32.h"
#include "SkStream.h"
#include "SkColorFilter.h"
#include "SkDrawLooper.h"
#include "SkMaskFilter.h"
#include "SkOrderedReadBuffer.h"
#include "SkPathEffect.h"
#include "SkRasterizer.h"
#include "SkShader.h"
#include "SkTypeface.h"
#include "SkXfermode.h"
static void set_paintflat(SkPaint* paint, SkFlattenable* obj, unsigned paintFlat) {
SkASSERT(paintFlat < kCount_PaintFlats);
switch (paintFlat) {
case kColorFilter_PaintFlat:
paint->setColorFilter((SkColorFilter*)obj);
break;
case kDrawLooper_PaintFlat:
paint->setLooper((SkDrawLooper*)obj);
break;
case kMaskFilter_PaintFlat:
paint->setMaskFilter((SkMaskFilter*)obj);
break;
case kPathEffect_PaintFlat:
paint->setPathEffect((SkPathEffect*)obj);
break;
case kRasterizer_PaintFlat:
paint->setRasterizer((SkRasterizer*)obj);
break;
case kShader_PaintFlat:
paint->setShader((SkShader*)obj);
break;
case kXfermode_PaintFlat:
paint->setXfermode((SkXfermode*)obj);
break;
default:
SkDEBUGFAIL("never gets here");
}
}
template <typename T> class SkRefCntTDArray : public SkTDArray<T> {
public:
~SkRefCntTDArray() { this->unrefAll(); }
};
class SkGPipeState {
public:
SkGPipeState();
~SkGPipeState();
void setReader(SkFlattenableReadBuffer* reader) {
fReader = reader;
fReader->setFactoryArray(&fFactoryArray);
}
const SkPaint& paint() const { return fPaint; }
SkPaint* editPaint() { return &fPaint; }
SkFlattenable* getFlat(unsigned index) const {
if (0 == index) {
return NULL;
}
return fFlatArray[index - 1];
}
void defFlattenable(PaintFlats pf, int index) {
SkASSERT(index == fFlatArray.count() + 1);
SkFlattenable* obj = fReader->readFlattenable();
*fFlatArray.append() = obj;
}
void addTypeface() {
size_t size = fReader->readU32();
const void* data = fReader->skip(SkAlign4(size));
SkMemoryStream stream(data, size, false);
*fTypefaces.append() = SkTypeface::Deserialize(&stream);
}
void setTypeface(SkPaint* paint, unsigned id) {
paint->setTypeface(id ? fTypefaces[id - 1] : NULL);
}
SkFlattenableReadBuffer* fReader;
private:
SkPaint fPaint;
SkTDArray<SkFlattenable*> fFlatArray;
SkTDArray<SkTypeface*> fTypefaces;
SkTDArray<SkFlattenable::Factory> fFactoryArray;
};
///////////////////////////////////////////////////////////////////////////////
template <typename T> const T* skip(SkReader32* reader, int count = 1) {
SkASSERT(count >= 0);
size_t size = sizeof(T) * count;
SkASSERT(SkAlign4(size) == size);
return reinterpret_cast<const T*>(reader->skip(size));
}
template <typename T> const T* skipAlign(SkReader32* reader, int count = 1) {
SkASSERT(count >= 0);
size_t size = SkAlign4(sizeof(T) * count);
return reinterpret_cast<const T*>(reader->skip(size));
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
static void clipPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkPath path;
path.unflatten(*reader);
canvas->clipPath(path, (SkRegion::Op)DrawOp_unpackData(op32));
}
static void clipRegion_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkRegion rgn;
reader->readRegion(&rgn);
canvas->clipRegion(rgn, (SkRegion::Op)DrawOp_unpackData(op32));
}
static void clipRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->clipRect(*skip<SkRect>(reader), (SkRegion::Op)DrawOp_unpackData(op32));
}
///////////////////////////////////////////////////////////////////////////////
static void setMatrix_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkMatrix matrix;
reader->readMatrix(&matrix);
canvas->setMatrix(matrix);
}
static void concat_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkMatrix matrix;
reader->readMatrix(&matrix);
canvas->concat(matrix);
}
static void scale_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
const SkScalar* param = skip<SkScalar>(reader, 2);
canvas->scale(param[0], param[1]);
}
static void skew_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
const SkScalar* param = skip<SkScalar>(reader, 2);
canvas->skew(param[0], param[1]);
}
static void rotate_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->rotate(reader->readScalar());
}
static void translate_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
const SkScalar* param = skip<SkScalar>(reader, 2);
canvas->translate(param[0], param[1]);
}
///////////////////////////////////////////////////////////////////////////////
static void save_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->save((SkCanvas::SaveFlags)DrawOp_unpackData(op32));
}
static void saveLayer_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
unsigned flags = DrawOp_unpackFlags(op32);
SkCanvas::SaveFlags saveFlags = (SkCanvas::SaveFlags)DrawOp_unpackData(op32);
const SkRect* bounds = NULL;
if (flags & kSaveLayer_HasBounds_DrawOpFlag) {
bounds = skip<SkRect>(reader);
}
const SkPaint* paint = NULL;
if (flags & kSaveLayer_HasPaint_DrawOpFlag) {
paint = &state->paint();
}
canvas->saveLayer(bounds, paint, saveFlags);
}
static void restore_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->restore();
}
///////////////////////////////////////////////////////////////////////////////
static void drawClear_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkColor color = 0;
if (DrawOp_unpackFlags(op32) & kClear_HasColor_DrawOpFlag) {
color = reader->readU32();
}
canvas->clear(color);
}
static void drawPaint_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->drawPaint(state->paint());
}
static void drawPoints_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkCanvas::PointMode mode = (SkCanvas::PointMode)DrawOp_unpackFlags(op32);
size_t count = reader->readU32();
const SkPoint* pts = skip<SkPoint>(reader, count);
canvas->drawPoints(mode, count, pts, state->paint());
}
static void drawRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
canvas->drawRect(*skip<SkRect>(reader), state->paint());
}
static void drawPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
SkPath path;
path.unflatten(*reader);
canvas->drawPath(path, state->paint());
}
static void drawVertices_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
unsigned flags = DrawOp_unpackFlags(op32);
SkCanvas::VertexMode mode = (SkCanvas::VertexMode)reader->readU32();
int vertexCount = reader->readU32();
const SkPoint* verts = skip<SkPoint>(reader, vertexCount);
const SkPoint* texs = NULL;
if (flags & kDrawVertices_HasTexs_DrawOpFlag) {
texs = skip<SkPoint>(reader, vertexCount);
}
const SkColor* colors = NULL;
if (flags & kDrawVertices_HasColors_DrawOpFlag) {
colors = skip<SkColor>(reader, vertexCount);
}
// TODO: flatten/unflatten xfermodes
SkXfermode* xfer = NULL;
int indexCount = 0;
const uint16_t* indices = NULL;
if (flags & kDrawVertices_HasIndices_DrawOpFlag) {
indexCount = reader->readU32();
indices = skipAlign<uint16_t>(reader, indexCount);
}
canvas->drawVertices(mode, vertexCount, verts, texs, colors, xfer,
indices, indexCount, state->paint());
}
///////////////////////////////////////////////////////////////////////////////
static void drawText_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
size_t len = reader->readU32();
const void* text = reader->skip(SkAlign4(len));
const SkScalar* xy = skip<SkScalar>(reader, 2);
canvas->drawText(text, len, xy[0], xy[1], state->paint());
}
static void drawPosText_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
size_t len = reader->readU32();
const void* text = reader->skip(SkAlign4(len));
size_t posCount = reader->readU32(); // compute by our writer
const SkPoint* pos = skip<SkPoint>(reader, posCount);
canvas->drawPosText(text, len, pos, state->paint());
}
static void drawPosTextH_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
size_t len = reader->readU32();
const void* text = reader->skip(SkAlign4(len));
size_t posCount = reader->readU32(); // compute by our writer
const SkScalar* xpos = skip<SkScalar>(reader, posCount);
SkScalar constY = reader->readScalar();
canvas->drawPosTextH(text, len, xpos, constY, state->paint());
}
static void drawTextOnPath_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
size_t len = reader->readU32();
const void* text = reader->skip(SkAlign4(len));
SkPath path;
path.unflatten(*reader);
SkMatrix matrixStorage;
const SkMatrix* matrix = NULL;
if (DrawOp_unpackFlags(op32) & kDrawTextOnPath_HasMatrix_DrawOpFlag) {
reader->readMatrix(&matrixStorage);
matrix = &matrixStorage;
}
canvas->drawTextOnPath(text, len, path, matrix, state->paint());
}
///////////////////////////////////////////////////////////////////////////////
static void drawBitmap_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
UNIMPLEMENTED
}
static void drawBitmapMatrix_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
UNIMPLEMENTED
}
static void drawBitmapRect_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
UNIMPLEMENTED
}
static void drawSprite_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
UNIMPLEMENTED
}
///////////////////////////////////////////////////////////////////////////////
static void drawData_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
// since we don't have a paint, we can use data for our (small) sizes
size_t size = DrawOp_unpackData(op32);
if (0 == size) {
size = reader->readU32();
}
const void* data = reader->skip(SkAlign4(size));
canvas->drawData(data, size);
}
static void drawPicture_rp(SkCanvas* canvas, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
UNIMPLEMENTED
}
///////////////////////////////////////////////////////////////////////////////
static void paintOp_rp(SkCanvas*, SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
size_t offset = reader->offset();
size_t stop = offset + PaintOp_unpackData(op32);
SkPaint* p = state->editPaint();
do {
uint32_t p32 = reader->readU32();
unsigned op = PaintOp_unpackOp(p32);
unsigned data = PaintOp_unpackData(p32);
// SkDebugf(" read %08X op=%d flags=%d data=%d\n", p32, op, done, data);
switch (op) {
case kReset_PaintOp: p->reset(); break;
case kFlags_PaintOp: p->setFlags(data); break;
case kColor_PaintOp: p->setColor(reader->readU32()); break;
case kStyle_PaintOp: p->setStyle((SkPaint::Style)data); break;
case kJoin_PaintOp: p->setStrokeJoin((SkPaint::Join)data); break;
case kCap_PaintOp: p->setStrokeCap((SkPaint::Cap)data); break;
case kWidth_PaintOp: p->setStrokeWidth(reader->readScalar()); break;
case kMiter_PaintOp: p->setStrokeMiter(reader->readScalar()); break;
case kEncoding_PaintOp:
p->setTextEncoding((SkPaint::TextEncoding)data);
break;
case kHinting_PaintOp: p->setHinting((SkPaint::Hinting)data); break;
case kAlign_PaintOp: p->setTextAlign((SkPaint::Align)data); break;
case kTextSize_PaintOp: p->setTextSize(reader->readScalar()); break;
case kTextScaleX_PaintOp: p->setTextScaleX(reader->readScalar()); break;
case kTextSkewX_PaintOp: p->setTextSkewX(reader->readScalar()); break;
case kFlatIndex_PaintOp: {
PaintFlats pf = (PaintFlats)PaintOp_unpackFlags(p32);
unsigned index = data;
set_paintflat(p, state->getFlat(index), pf);
break;
}
case kTypeface_PaintOp: state->setTypeface(p, data); break;
default: SkDEBUGFAIL("bad paintop"); return;
}
SkASSERT(reader->offset() <= stop);
} while (reader->offset() < stop);
}
///////////////////////////////////////////////////////////////////////////////
static void def_Typeface_rp(SkCanvas*, SkReader32*, uint32_t, SkGPipeState* state) {
state->addTypeface();
}
static void def_PaintFlat_rp(SkCanvas*, SkReader32*, uint32_t op32,
SkGPipeState* state) {
PaintFlats pf = (PaintFlats)DrawOp_unpackFlags(op32);
unsigned index = DrawOp_unpackData(op32);
state->defFlattenable(pf, index);
}
///////////////////////////////////////////////////////////////////////////////
static void skip_rp(SkCanvas*, SkReader32* reader, uint32_t op32, SkGPipeState*) {
size_t bytes = DrawOp_unpackData(op32);
(void)reader->skip(bytes);
}
static void done_rp(SkCanvas*, SkReader32*, uint32_t, SkGPipeState*) {}
typedef void (*ReadProc)(SkCanvas*, SkReader32*, uint32_t op32, SkGPipeState*);
static const ReadProc gReadTable[] = {
skip_rp,
clipPath_rp,
clipRegion_rp,
clipRect_rp,
concat_rp,
drawBitmap_rp,
drawBitmapMatrix_rp,
drawBitmapRect_rp,
drawClear_rp,
drawData_rp,
drawPaint_rp,
drawPath_rp,
drawPicture_rp,
drawPoints_rp,
drawPosText_rp,
drawPosTextH_rp,
drawRect_rp,
drawSprite_rp,
drawText_rp,
drawTextOnPath_rp,
drawVertices_rp,
restore_rp,
rotate_rp,
save_rp,
saveLayer_rp,
scale_rp,
setMatrix_rp,
skew_rp,
translate_rp,
paintOp_rp,
def_Typeface_rp,
def_PaintFlat_rp,
done_rp
};
///////////////////////////////////////////////////////////////////////////////
SkGPipeState::SkGPipeState() {}
SkGPipeState::~SkGPipeState() {
fTypefaces.safeUnrefAll();
fFlatArray.safeUnrefAll();
}
///////////////////////////////////////////////////////////////////////////////
#include "SkGPipe.h"
SkGPipeReader::SkGPipeReader(SkCanvas* target) {
SkSafeRef(target);
fCanvas = target;
fState = NULL;
}
SkGPipeReader::~SkGPipeReader() {
SkSafeUnref(fCanvas);
delete fState;
}
SkGPipeReader::Status SkGPipeReader::playback(const void* data, size_t length,
size_t* bytesRead, bool readAtom) {
if (NULL == fCanvas) {
return kError_Status;
}
if (NULL == fState) {
fState = new SkGPipeState;
}
SkASSERT(SK_ARRAY_COUNT(gReadTable) == (kDone_DrawOp + 1));
const ReadProc* table = gReadTable;
SkOrderedReadBuffer reader(data, length);
SkCanvas* canvas = fCanvas;
Status status = kEOF_Status;
fState->setReader(&reader);
while (!reader.eof()) {
uint32_t op32 = reader.readU32();
unsigned op = DrawOp_unpackOp(op32);
SkDEBUGCODE(DrawOps drawOp = (DrawOps)op;)
if (op >= SK_ARRAY_COUNT(gReadTable)) {
SkDebugf("---- bad op during GPipeState::playback\n");
status = kError_Status;
break;
}
if (kDone_DrawOp == op) {
status = kDone_Status;
break;
}
table[op](canvas, reader.getReader32(), op32, fState);
if (readAtom &&
(table[op] != paintOp_rp &&
table[op] != def_Typeface_rp &&
table[op] != def_PaintFlat_rp
)) {
status = kReadAtom_Status;
break;
}
}
if (bytesRead) {
*bytesRead = reader.offset();
}
return status;
}